WorkbenchA useful little toolbox.

Minecraft NBT editor

Read Java NBT as typed JSON and export an edited copy.

Processed on your device. No file upload.
Choose a file to get started

Drop it here, or use the file picker.

How to use this tool

  1. Choose your file or try the example.
  2. Run the tool and check the result.
  3. Save the result where a download is available.

Supported features & limits

Supports Java big-endian NBT, raw or gzip, with all 12 tag types. Read a file to populate the JSON editor, then choose Export. Keep type IDs and use strings for 64-bit integers. Bedrock, region files and zlib wrappers are not supported. Maximum 10 MB input, 32 MB decoded.

What happens to my files?

Your browser reads the file locally. File contents are not sent to our server. Closing or resetting this page clears the working result. Downloaded copies remain on your device.

Maintained by Roman Zmazhenko. Updated 1 November 2026.